In a reflector antenna[?], the relative reduction in the effective aperture of the antenna caused by the masking effect of other antenna parts, such as a feed horn or a secondary reflector, which parts obstruct the radiation path.
... - the only fighter other than the F-22 capable of it.
According to EADS, the maximum speed possible without reheat is Mach 1.5 (although this drops to Mach 1.2 with an ...